MESON Chess Problem Database

Problem Display
PID: 67933 (3NknK1/4p3/8/8/8/8/8/3Q4 w - - 0 1)

Chepizhni, Viktor Ivanovich

Die Schwalbe, 1984

3NknK1/4p3/8/8/8/8/8/3Q4

#2

3 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Sc6?
      • threat
        • 2.Qd8#
      • 1...Sd7
        • 2.Qh5#
      • 1...Se6!
    • 1.Se6?
      • threat
        • 2.Sc7#
        • 2.Sg7#
        • 2.Qd8#
      • 1...Sd7
        • 2.Qh5#
      • 1...Sxe6!
    • 1.Sf7?
      • threat
        • 2.Qd8#
      • 1...Se6
        • 2.Qa4#
      • 1...Sd7!
  • Keys
    • 1.Sb7!
      • threat
        • 2.Qd8#
      • 1...Se6
        • 2.Qa4#
      • 1...Sd7
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(A)
      • Vars
        • S(c);N_GUARD,SBLOCK::QAB(A)
      • Refutation
        • S(c);
    • Try
      • S(B);
      • Threat
        • DUALS(3)
      • Vars
        • S(c);N_GUARD,SBLOCK::QAB(A)
      • Refutation
        • S(c);XS(B)
    • Try
      • S(B);
      • Threat
        • QAR1(A)
      • Vars
        • S(c);N_GUARD::QAB(A)
      • Refutation
        • S(c);
  • Actual
    • S(B);
    • Threat
      • QAR1(A)
    • Vars
      • S(c);N_GUARD::QAB(A)
      • S(c);N_GUARD,SBLOCK::QAB(A)
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